reorganized Sublime Text extensions, added some

Moved extensions that were in JSON to JavaScript, as comments are allowed in the Sublime files, and were being incorrectly highlighted as errors (see [this file](https://github.com/titoBouzout/SideBarEnhancements/blob/st3/Side%20Bar.sublime-settings), for example). Added several more extensions to JavaScript that hadn't been included previously. Finally, added 2 extensions to XML.